Question about 2004 Chevrolet TrailBlazer

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Whe the engine is on and the gear selector is in Drive, the vehicle still does not go forward. What could the possible problems be?

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It may be the fly wheel not makeing contact

Posted on Sep 02, 2010

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Posted on Jan 02, 2017

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1 Answer

50 horse 4 stwont go into reverse gear due to shaft problems


the drive shaft just drives a pinion gear in the prop box that drives to gears that spin in opposite directions all the time
by selecting forward with the selector rod , a dog gear is moved forward to mesh with one gear that is turning or moves the other way to engage the other gear that is turning
that is the forward or reverse action for the prop
if you have forward but no reverse the it is not a drive shaft problem but a selector rod adjustment that is not moving the dog far enough to engage the running gear

Jul 08, 2017 | Cars & Trucks

1 Answer

Stuck in drive wont shift in any other gear any advice?


jack up and safely go under neath vehicle and check the shift selector connection if good check cable /linkage from tranny to selector for proper connections and operations if good --try moving selector if moves try to put in neutral if hard to move or selector wont move possible internal gear damage

May 09, 2016 | 1983 Pontiac Firebird

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I HAVE A MICRA 2005 MODEL WITH NO POWER. WHEN THE CAR IS IN NEUTRAL CAR REVS FINE, THE MOMENT YOU SELECT 1ST GEAR ENGINE LABOURS AND REVS UP VERY SLOWLY AND DOESNT REV PASED 4000 RPM PLEASE ADVISE


possible selector problem when you push forward for 1st your are actually pushing into 3rd, try starting car from 2nd gear and see if it stalls as that would mean you are hitting 4th. usually a car can pull off in second gear ok. if this is the case go to a dealer to sort this out. as your gear selector is not aligning up correctly. if this is not the case the engine could be losing compression but that seems less likely.

Oct 22, 2014 | 2005 Nissan Micra Visia

1 Answer

Citroen jumper gear change


Your description makes me remember an old Austin Metropolitan I had once. The gear linkage was crude and it was possible sometimes to engage two gears at once resulting in a lock-up and a stalled engine. It never happened while driving at speed.

When repairing a gearbox, once the selector linkage has been removed it is usual to select two gears in order to lock the shafts for the tightening or loosening of a retaining nut. There is built into the internal selector linkage an interlock to prevent two gears being selected.

I imagine that interlock in your gearbox is worn or broken...

Jul 30, 2017 | Cars & Trucks

1 Answer

My 2000 Sephia will only shift gears manually from 1,2, then to drive. I get a code PO734. How do I fix and or slove this problem?


This is what your codes mean:

Trouble Code-P0734 (A/T Additional Gear Ratio Error In Fourth Gear)


Trouble Code Conditions:
Vehicle driven to a speed of 4-37 mph at more than 500 rpm, gear selector in 4th Gear in Drive, and the PCM detected too much difference in the engine speed and output shaft speed.
Possible Causes:
  • Customer may complain of intermittent 4th gear operation
  • O/D and 2/4 pressures less than 75 psi
  • O/D or 2/4 clutch volume indexes out of specification
  • O/D accumulator seals are damaged
  • Transmission enters "limp in" mode running in 4th gear

Trouble Code-P0735 (A/T Gear Ratio Error Fourth Prime)

Trouble Code Conditions:
Vehicle driven any forward Gear, and the TCM detected the ratio of the Input speed to the Output Speed did not match the current Gear Ratio (this test can take up to 5 minutes).
Possible Causes:
  • Related Gear Ratio trouble codes may be stored (note that some of these Gear Ratio trouble codes may be intermittent)
  • Transmission has internal problems or damage present
You have a transmission problem.Hope this helps, James Booth

May 17, 2011 | Kia Sephia Cars & Trucks

2 Answers

Code po734, po735


This is what your codes mean:

Trouble Code-P0734 (A/T Additional Gear Ratio Error In Fourth Gear)


Trouble Code Conditions:
Vehicle driven to a speed of 4-37 mph at more than 500 rpm, gear selector in 4th Gear in Drive, and the PCM detected too much difference in the engine speed and output shaft speed.

Possible Causes:

  • Customer may complain of intermittent 4th gear operation
  • O/D and 2/4 pressures less than 75 psi
  • O/D or 2/4 clutch volume indexes out of specification
  • O/D accumulator seals are damaged
  • Transmission enters "limp in" mode running in 4th gear

Trouble Code-P0735 (A/T Gear Ratio Error Fourth Prime)

Trouble Code Conditions:
Vehicle driven any forward Gear, and the TCM detected the ratio of the Input speed to the Output Speed did not match the current Gear Ratio (this test can take up to 5 minutes).

Possible Causes:

  • Related Gear Ratio trouble codes may be stored (note that some of these Gear Ratio trouble codes may be intermittent)
  • Transmission has internal problems or damage present
You have a transmission problem.

Jan 17, 2011 | 2003 Dodge Durango

1 Answer

Dash light came on looks like cog with !


Gear with ! (Automatic transmission)
Yellow warning lamp = The transmission is malfuctioning. Avoid heavy loads. All of the selector lever positions can continue to be engaged; in the forward drive positions, however, the vehicle will be operating in a restricted gear range only. Have the system checked as soon as possible.

Aug 05, 2009 | 1999 BMW Z3

2 Answers

How do i reprogram the computer on my 2002 xl7


Try this relearn procedure hopefully it will help

Vehicles equipped with engine or transmission computers may require a relearn procedure after the vehicle battery is disconnected. Many vehicle computers memorize and store vehicle operation patterns for optimum driveability and performance. When the vehicle battery is disconnected, this memory is lost. The computer will use default data until new data from each key start is stored. As the computer memorizes vehicle operation for each new key start, driveability is restored. Vehicle computers may memorize vehicles operation patterns for 40 or more key starts. Customers often complain of driveability problems during the relearn stage because the vehicle acts differently then before being serviced. Depending on the type of vehicle and how it is equipped, the following complaints (driveability problems) may exist:

Harsh Or Poor Shift Quality
Rough Or Unstable Idle
Hesitation Or Stumble
Rich Or Lean Running
Poor Fuel Mileage

These symptoms and complaints should disappear after a number of drive cycles have been memorized. To reduce the possibility of complaints, after any service which requires battery power to be disconnected, vehicle should be road tested.

Vehicle Preparation

Ensure all components are connected. Ensure transmission fluid level is correct. Warm engine to normal operating temperature. If vehicle has been repaired, perform KOEO and Continuous Memory Code Self-Test and ensure fault codes are not present.

Computer Relearn Procedures

Idle Relearn Procedure

Place automatic transmission in Park or manual transmission in Neutral position. Ensure the emergency brake has been set and all accessories are turned off. Start engine and bring to normal operating temperature. Allow manual transmission vehicle to idle in Neutral for one minute. Allow automatic transmission to idle in Neutral for one minute and then to idle in Drive for one minute. Once initial relearn is complete, process will be completed during normal driving. Always complete the procedure before returning the vehicle to the customer.

Drive Cycle Test (AOD-E, AXOD & AXOD-E TRANSAXLES)

With transmission gear selector in Overdrive, moderately accelerate vehicle to 50 MPH for a minimum of 15 seconds. Transmission should be in 4th gear. While holding speed steady, lightly apply and release brake for about 5 seconds. Stop and park vehicle for a minimum of 20 seconds with transmission gear selector in Drive. Repeat procedure 5 times. Always complete the procedure before returning the vehicle to the customer.

Drive Cycle Test (E4OD)

With transmission gear selector in Drive, press Overdrive Cancel Switch (LED should light). Moderately accelerate vehicle to 40 MPH for a minimum of 15 seconds (30 seconds above 4000-ft. elevation) Transmission should be in 3rd gear. While holding speed steady, press Overdrive Cancel Switch (LED should go off) and accelerate from 40 MPH to 50 MPH. Transmission should shift from 3rd gear to 4th gear. Hold speed steady for 15 seconds. While holding speed steady, lightly apply and release brakes enough to turn brake lights on. Maintain 50 MPH for about 5 seconds. Stop vehicle for a minimum of 20 seconds with transmission gear selector in Drive. Repeat procedure 5 times. Always complete the procedure before returning the vehicle to the customer.

Mar 26, 2009 | 1998 Lincoln Mark VIII

1 Answer

1990 Suzuki Escudo 4 wheel drive


As far as I know the procedure should go something like this...

Stop the vehicle, engage the parking brake and if applicable, get out and turn the hubs on the front wheels from Free, to Lock.(You may not have these on a Suzuki, they may be auto-lockers)

Get back in the vehicle and put the transmission shift selector into Neutral.

If you have a manual transfer case, move the selector-shaft to 4x4-High, or 4x4-Low -- whichever is desired. Now, putting the vehicle in gear with the transfer case is sometimes somewhat difficult. As long as the vehicle's transmission is in neutral, don't worry, the gears inside the transfer case are big and beefy -- Don't be afraid to be rough -- Again as long as the transmission is in neutral. You may also have to disengage the parking brake and slightly let the vehicle roll forward or back with your foot-brake to get the Transfer case to lock into place.

Once 4x4 of the selected High, Or Low range is selected, usually indicated by the vehicle jerking slightly with a slightly loud clank/thud. Move the Transmission selector out of neutral into your desired gear (Drive if Automatic, if Manual, whichever gear you pull out from). and voila! You should now be in 4-Wheel-Drive.

To disengage 4-Wheel-Drive. Just reverse the steps.

May 16, 2008 | 1990 Suzuki Sidekick

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